Build a Recycled Greenhouse Using Old Windows: Bev’s DIY Guide

Looking for a clever way to reuse old windows and save money on gardening? Learn how to build a recycled greenhouse with this inspiring DIY example from Bev, who turned the unused space beneath her deck into a thriving greenhouse using mostly salvaged materials.

Whether you're short on space, budget-conscious, or just love upcycling, this build proves that beautiful greenhouses don’t need a big footprint — or a big wallet.

Greenhouse built from recycled windows, situated beneath a deck.

Transform Wasted Space: How This Under-Deck Greenhouse Came to Life

Bev started her "build a recycled greenhouse" project in October of 2011, and it took around two months. She adds "more like a month to build really, as we had time out, due to sickness and a trip."

She says: "Here is my recycled greenhouse/potting shed. I built four bins, two on top, and two underneath, for potting mixtures."

concealed greenhouse potting bins

Genius Bins with Removable Lids: Grow Lettuce All Winter

Bev says, "The two top ones have removable covers, so in the winter I can just plant lettuce and spinach right in them!

All the counters are slatted boards. I did start some broccoli and cabbage and a few are starting to come up in pots.

"Can't wait to get them outside so they can get some real sun! I've just stained the counters and need to apply spa varnish before I start to work out there. Onions will be next!

I do those by seed so I need to start them early ... I did them in the spring last year so they are still out in the garden growing!"

DIY Truths Revealed: Why “Measure Twice, Cut Three Times” Might Just Work

According to Bev, to make her recycled greenhouse it was a case of "measure twice and cut three times!" (I know how *that* goes!) :-) and claims that they're total newbies at DIY stuff (though I can't tell—just look at these great photos!)—just a bit of touch-up paint/stain, and the job's a good 'un! :-)

The greenhouse was built around the recycled windows—but the rest of the stuff was from Lowe's.

The siding is called LP SmartSide Paneling—pressed-wood pieces on one side, and molded to look like paneling on the other side. The panels come pre-primed and ready to be painted!

Bev put up pegboard on the walls, very handy for hanging tools.

Recycled Greenhouse with easy out-of-the-rain access

Seedling Central: What’s Growing Inside This Greenhouse

I asked Bev what she would grow in her recycled greenhouse.

She told me, "I have all my seedlings here; tomatoes, peppers, squash of all kinds; herbs and some flowers—and eggplant!

I had my broccoli, cabbage, and Swiss chard started in there, but they are now outside."

Why Bev Got Certified — And the Secrets She Learned About Growing

It's vitally important to know what you're doing. Bev decided she would take classes and get her Master Gardener certification.

The course started February 2nd, and finished on April 19th—and Bev's now a proud Master Gardener! I asked Bev what's the best thing she learned from the Master Gardener classes.

Her response: "We had some great hands-on classes about pruning fruit trees and smaller fruits like grapes, blueberries, and raspberries.

We also learned about Companion Planting or Farm Scaping which means planting certain veg and/or flowers next to certain vegetables to repel or attract good bugs and bad bugs... as well as rotating your veggies with plants that are not within the same family.

Kind of an organic type of pest control."

From Backyard to Community: How Bev Pays It Forward

I posed this question to Bev next: Will you use the Master Gardener Certification for your own use, or do you think you'll use it in another capacity?

Bev: "Mostly for my own use, but I am also helping start a community garden for some folks I know and plan to do some volunteer work for Jackson and Swain County (in North Carolina).

"We need to continue to put in 20- to 40 hours a year of training and volunteer work to keep our certification."

narrow greenhouse shelves perfect for storing pots

Peek Inside: Photos of This Clever Recycled Greenhouse Build

Check out Bev's shallow shelves - they're great for storing flower pots.

Volunteer to Maintain Certification

Wow, I certainly didn't know you had to do volunteer work to maintain certification! You learn something new every day ;-)

To be honest, I've never met such a hard-working lady—not only does Bev do all this, but she's a top-notch Realtor too!

A traditional black frame greenhouse in a sunny gardenCourtesy of Canva - Registered User

FAQ: Your Top Greenhouse Kit Questions Answered

Are greenhouse kits easy to erect?

Yes, most greenhouse kits are easy to erect. The average person can usually have a kit assembled in a few hours.

What is the best way to heat a greenhouse?

Propane heaters are popular for reliable warmth, but solar-powered options are growing in popularity for energy savings.

Do greenhouses need ventilation?

Yes, greenhouses need ventilation to prevent the build-up of heat and humidity inside the greenhouse. The ventilation should be opened in the morning to let the hot air out and closed in the evening to keep the warm air in.

What is the best way to cool a greenhouse?

Evaporative coolers work well, but natural shade and cross-ventilation can be surprisingly effective and low-cost.

Can I build a greenhouse using just recycled materials?

Yes! Many gardeners use old windows, doors, and lumber. It’s budget-friendly and environmentally smart — just make sure the materials are safe and sturdy.

hoop-style greenhouseCourtesy of Canva - Registered User

Check out this source for Hoop Greenhouse Kits!

If you've ever watched Homestead Rescue, then you'll know that Misty is a big fan of hoop greenhouses!

Hey, before you leave, don't forget to pick up your free eBook called "How to Grow and Dehydrate Herbs" here!

Smart Greenhouse Building Tips You’ll Wish You Knew Sooner

  1. Choose a location for the greenhouse that gets plenty of sunlight.
  2. Make sure the location has level ground and is well-drained.
  3. Choose a greenhouse kit that is easy to assemble.
  4. Follow the instructions carefully when assembling the greenhouse.
  5. Ventilate the greenhouse regularly to prevent the build-up of heat and humidity.
  6. Insulate the greenhouse to keep the heat in during the winter and the cool in during the summer.
  7. Water the plants inside the greenhouse regularly.
  8. Fertilize the plants inside the greenhouse regularly.
  9. Prune the plants inside the greenhouse regularly to promote growth.

Feeling inspired to build your own recycled greenhouse? Whether you're working with old windows, doors, or deck space, just remember: it doesn't have to be perfect to be productive. Start small, grow what you love, and don’t be afraid to get creative — your garden (and pantry) will thank you!

Now You Know How to Build a Recycled Greenhouse

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